English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We investigate the production of primordial black holes (PBHs) in a mixedinflaton-curvaton scenario with a quadratic curvaton potential, assuming thecurvaton is in de Sitter equilibrium during inflation with $\langle \chi\rangle=0$. In this setup, the curvature perturbation sourced by the curvaton isstrongly non-Gaussian, containing no leading Gaussian term. We show that for$m^2/H^2\gtrsim 0.3$, the curvaton contribution to the spectrum of primordialperturbations on CMB scales can be kept negligible but on small scales thecurvaton can source PBHs. In particular, PBHs in the asteroid mass range$10^{-16}M_{\odot}\lesssim M\lesssim 10^{-10}M_{\odot}$ with an abundancereaching $f_{\rm PBH} = 1$ can be produced when the inflationary Hubble scale$H\gtrsim 10^{12}$ GeV and the curvaton decay occurs in the window fromslightly before the electroweak transition to around the QCD transition.

Primordial black holes from a curvaton scenario with strongly non-Gaussian perturbations